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Geotechnical Investigation for Administrative Building | Geologist in Ambrolauri, Georgia

Ambrolauri, Georgia2026Government
Cohesive clay core samples in a core box recovered during GGG geotechnical investigation in Ambrolauri, Georgia, with pen for scale
Yellow truck-mounted rotary drilling rig operating at night under street lamps near administrative buildings in Ambrolauri, Georgia
Daytime rotary drilling rig and GGG worker on site for the Ambrolauri Service Agency geotechnical investigation, Caucasus foothills behind
Soviet-era truck-mounted drilling rig with tall mast deployed at dusk in a rural orchard near Ambrolauri, Racha-Lechkhumi, Georgia
Night-shift borehole drilling with GGG geologist next to yellow rotary rig and stacked drill rods under floodlights in Ambrolauri, Georgia
Yellow rotary drilling rig with extended mast on paved square in Ambrolauri, Georgia, during geotechnical investigation by GGG
GGG technician in orange high-visibility jacket guiding drill rods on a rotary rig at the Ambrolauri administrative building site
Older Soviet truck-mounted drilling rig at a rural site near Ambrolauri, Georgia, with utility pole and forested Caucasus hills behind
GGG geologist beside yellow rotary drilling rig at the Ambrolauri Service Agency site, ground wet with drilling fluid against a building wall
Wide view of GGG drilling rig and rods on paved area in Ambrolauri, Georgia, with administrative buildings and Racha mountains in the background

Services Used

Geotechnical InvestigationBorehole DrillingIn-Situ SPT TestingLaboratory AnalysisFoundation Design Consulting

Georgian Geotechnical Group conducted a detailed geotechnical investigation in Ambrolauri, Racha-Lechkhumi region of Georgia, for the construction of the new administrative building of the Ambrolauri Service Agency. Our team of geologists carried out site characterization, soil profiling, in-situ testing, and laboratory analysis to define the engineering-geological conditions of the site. The work delivered the bearing capacity, settlement, and seismic design parameters required to support safe, durable foundation design for this government one-stop service center.

Challenge

The Ambrolauri site sits in the Rioni river valley of the Racha-Lechkhumi region, where alluvial deposits interfinger with colluvial material shed from the surrounding Caucasus foothills, producing a laterally variable subsurface with inconsistent bearing capacity.

Differential settlement is a primary concern for a multi-story administrative building with concentrated column loads and strict serviceability requirements. The region also lies within a moderate-to-high seismic hazard zone of the Caucasus thrust system, requiring site response and liquefaction assessment in accordance with Eurocode 8 and Georgian Building Code DBN.

Perched groundwater within the alluvium and slope stability influences from the adjacent mountainous terrain added further constraints on the foundation strategy and excavation design.

Solution

GGG deployed a multi-phase investigation program combining two truck-mounted rotary drilling rigs operating on day and night shifts to meet the project schedule. The crews performed rotary borehole drilling with continuous core recovery, in-situ Standard Penetration Tests at regular intervals, and collected both disturbed and undisturbed samples for laboratory testing. Groundwater levels were logged in each borehole and monitored over time.

Laboratory analysis covered grain size distribution, Atterberg limits, natural moisture content, density, shear strength, and one-dimensional consolidation.

The data were synthesized into engineering-geological cross sections and a geotechnical report providing soil stratigraphy, characteristic parameters, bearing capacity, settlement estimates, and seismic design inputs for the structural engineer.

Results

  • Delivered a complete geological and geotechnical model of the site, including stratigraphy and groundwater conditions for the building footprint
  • Characterized the physico-mechanical properties of each soil unit through combined in-situ SPT and laboratory testing
  • Provided foundation recommendations with allowable bearing capacity and settlement estimates suited to the loads of the administrative building
  • Assessed seismic site conditions and provided design parameters in line with Eurocode 8 and Georgian Building Code DBN requirements
  • Issued a final geotechnical report supporting safe, code-compliant design and construction of the new Ambrolauri Service Agency building

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